Energy Storage Science and Technology ›› 2021, Vol. 10 ›› Issue (2): 714-721.doi: 10.19799/j.cnki.2095-4239.2020.0362

• Energy Storage Test: Methods and Evaluation • Previous Articles     Next Articles

Fuel cell electric performance and gas tightness attenuation under influence of enhanced road vibration spectrum

Fenglai PEI(), Yunhan OUYANG   

  1. Shanghai Motor Vehicle Inspection Certification & Tech Innovation Center Co. Ltd. , Shanghai 201805, China
  • Received:2020-11-09 Revised:2020-11-13 Online:2021-03-05 Published:2021-03-05
  • Contact: Fenglai PEI E-mail:fenglaip@smvic.com.cn

Abstract:

The durability and reliability of vehicle fuel cells are key problems restricting the development of commercial fuel cells. Mostly, current fuel cell vibration tests refer to the vibrational spectrum of power batteries, which does not match those of fuel cell influence studies. Its influence mechanism is analyzed, and a novel testing program is designed. In this paper, the power density spectrum of a vibration bench is converted from a typical vehicle driving cycle through smoothing and degradation treatment. An intensified vibration test proceeded using a typical fuel cell stack. By choosing the remarkable influence direction, a 270 h endurance test is done to simulate the impact of a 30000 km actual drive cycle. During the test, an acoustic meter is used to confirm the amplifying effect of the shock absorber on vibration acceleration. After the test, the variation law of fuel cell electrical performance and the sealing property were analyzed through a polarization curve test, airtightness test, and other performance characterization methods. The research shows that long-term durability vibration attenuates fuel cell electrical performance. The inside proton exchange membrane and outer shell package of fuel cell decay to different degrees as well.

Key words: fuel cell, intensive vibrational spectrum, performance attenuation, gas tightness attenuation

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